MAX8821 Evaluation Kit
POWER SUPPLY
+2.7V TO +5.5V
-
+
VERIFY
SHUNT
VERIFY RED
LED LIGHT
VERIFY BLUE
LED LIGHT
VERIFY SHUNT
VERIFY SHUNTS
JU5
1
JU1
D7
JU7
B
R
W
D6
VERIFY SHUNT
ARE NOT INSTALLED
2
G
DIFFERENTIAL
AUDIO INPUT
+
-
AIN+
AIN-
JU2
JU3
3
MAX8821
JU6
B
R
G
W
D5
D4
VERIFY SHUNT
1 2 3
JU4
EV KIT+
D3
VERIFY WHITE
GND
D2
LED LIGHT
(D1–D4)
VERIFY SOUND FROM
4 Ω /8 Ω SPEAKER
-
+
J1
D1
VERIFY SHUNT
-
VOLTMETER
(DMM2)
+
CONNECT 20-PIN
-
VOLTMETER
(DMM1)
+
RECEPTACLE TO
CMAXQUSB+ (P3)
Figure 1. Test Procedure Setup for MAX8821 EV Kit
14) Observe correct audio source polarity. Connect
the audio source to AIN+ and AIN-. Refer to the
MAX8821 data sheet for more information about dif-
ferential audio signals, single-ended audio signals,
input capacitors (C1, C2 in Figure 5), and the com-
mon-mode bias voltage range.
15) Connect the positive lead of DMM1 to LDO1 and
the negative lead to GND.
16) Connect the positive lead of DMM2 to LDO2 and
the negative lead to GND.
17) Turn on the power supply.
18) Turn on the audio source.
19) Start the MAX8821 EV kit software by opening its icon
at Start | Programs | MAX8821 EVALUATION KIT .
4
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